Document (#37495)

Author

Leydesdorff, L.
Rotolo, D.
Rafols, I.

Title

Bibliometric perspectives on medical innovation using the medical subject headings of PubMed

Source

Journal of the American Society for Information Science and Technology. 63(2012) no.11, S.2239-2253

Year

2012

Abstract

Multiple perspectives on the nonlinear processes of medical innovations can be distinguished and combined using the Medical Subject Headings (MeSH) of the MEDLINE database. Focusing on three main branches-"diseases," "drugs and chemicals," and "techniques and equipment"-we use base maps and overlay techniques to investigate the translations and interactions and thus to gain a bibliometric perspective on the dynamics of medical innovations. To this end, we first analyze the MEDLINE database, the MeSH index tree, and the various options for a static mapping from different perspectives and at different levels of aggregation. Following a specific innovation (RNA interference) over time, the notion of a trajectory which leaves a signature in the database is elaborated. Can the detailed index terms describing the dynamics of research be used to predict the diffusion dynamics of research results? Possibilities are specified for further integration between the MEDLINE database on one hand, and the Science Citation Index and Scopus (containing citation information) on the other.

Theme

Informetrie

Field

Medizin

Object

PubMed
MEDLINE

Aid

MeSH

Similar documents (author)

1. Rotolo, D.; Rafols, I.; Hopkins, M.M.; Leydesdorff, L.: Strategic intelligence on emerging technologies : scientometric overlay mapping (2017) 4.75

   4.7487984 = sum of:
     4.7487984 = sum of:
       0.8478916 = weight(author_txt:leydesdorff in 3322) [ClassicSimilarity], result of:
         0.8478916 = score(doc=3322,freq=1.0), product of:
           0.37582025 = queryWeight, product of:
             7.2195506 = idf(docFreq=87, maxDocs=44218)
             0.052055907 = queryNorm
           2.2561095 = fieldWeight in 3322, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.2195506 = idf(docFreq=87, maxDocs=44218)
             0.3125 = fieldNorm(doc=3322)
       1.8118302 = weight(author_txt:rafols in 3322) [ClassicSimilarity], result of:
         1.8118302 = score(doc=3322,freq=1.0), product of:
           0.623493 = queryWeight, product of:
             1.2880292 = boost
             9.298992 = idf(docFreq=10, maxDocs=44218)
             0.052055907 = queryNorm
           2.905935 = fieldWeight in 3322, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.298992 = idf(docFreq=10, maxDocs=44218)
             0.3125 = fieldNorm(doc=3322)
       2.0890763 = weight(author_txt:rotolo in 3322) [ClassicSimilarity], result of:
         2.0890763 = score(doc=3322,freq=1.0), product of:
           0.68557686 = queryWeight, product of:
             1.3506349 = boost
             9.7509775 = idf(docFreq=6, maxDocs=44218)
             0.052055907 = queryNorm
           3.0471804 = fieldWeight in 3322, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             9.7509775 = idf(docFreq=6, maxDocs=44218)
             0.3125 = fieldNorm(doc=3322)
   

2. Rotolo, D.; Leydesdorff, L.: Matching Medline/PubMed data with Web of Science: A routine in R language (2015) 3.13

   3.1327658 = sum of:
     3.1327658 = product of:
       4.6991487 = sum of:
         1.3566266 = weight(author_txt:leydesdorff in 2224) [ClassicSimilarity], result of:
           1.3566266 = score(doc=2224,freq=1.0), product of:
             0.37582025 = queryWeight, product of:
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.052055907 = queryNorm
             3.6097753 = fieldWeight in 2224, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.5 = fieldNorm(doc=2224)
         3.3425221 = weight(author_txt:rotolo in 2224) [ClassicSimilarity], result of:
           3.3425221 = score(doc=2224,freq=1.0), product of:
             0.68557686 = queryWeight, product of:
               1.3506349 = boost
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.052055907 = queryNorm
             4.8754888 = fieldWeight in 2224, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.5 = fieldNorm(doc=2224)
       0.6666667 = coord(2/3)
   

3. Leydesdorff, L.; Rafols, I.: ¬A global map of science based on the ISI subject categories (2009) 2.84

   2.8370368 = sum of:
     2.8370368 = product of:
       4.255555 = sum of:
         1.3566266 = weight(author_txt:leydesdorff in 2713) [ClassicSimilarity], result of:
           1.3566266 = score(doc=2713,freq=1.0), product of:
             0.37582025 = queryWeight, product of:
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.052055907 = queryNorm
             3.6097753 = fieldWeight in 2713, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.5 = fieldNorm(doc=2713)
         2.8989284 = weight(author_txt:rafols in 2713) [ClassicSimilarity], result of:
           2.8989284 = score(doc=2713,freq=1.0), product of:
             0.623493 = queryWeight, product of:
               1.2880292 = boost
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.052055907 = queryNorm
             4.649496 = fieldWeight in 2713, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.5 = fieldNorm(doc=2713)
       0.6666667 = coord(2/3)
   

4. Rafols, I.; Leydesdorff, L.: Content-based and algorithmic classifications of journals : perspectives on the dynamics of scientific communication and indexer effects (2009) 2.84

   2.8370368 = sum of:
     2.8370368 = product of:
       4.255555 = sum of:
         1.3566266 = weight(author_txt:leydesdorff in 3095) [ClassicSimilarity], result of:
           1.3566266 = score(doc=3095,freq=1.0), product of:
             0.37582025 = queryWeight, product of:
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.052055907 = queryNorm
             3.6097753 = fieldWeight in 3095, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.5 = fieldNorm(doc=3095)
         2.8989284 = weight(author_txt:rafols in 3095) [ClassicSimilarity], result of:
           2.8989284 = score(doc=3095,freq=1.0), product of:
             0.623493 = queryWeight, product of:
               1.2880292 = boost
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.052055907 = queryNorm
             4.649496 = fieldWeight in 3095, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.5 = fieldNorm(doc=3095)
       0.6666667 = coord(2/3)
   

5. Leydesdorff, L.; Rafols, I.: Local emergence and global diffusion of research technologies : an exploration of patterns of network formation (2011) 2.84

   2.8370368 = sum of:
     2.8370368 = product of:
       4.255555 = sum of:
         1.3566266 = weight(author_txt:leydesdorff in 4445) [ClassicSimilarity], result of:
           1.3566266 = score(doc=4445,freq=1.0), product of:
             0.37582025 = queryWeight, product of:
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.052055907 = queryNorm
             3.6097753 = fieldWeight in 4445, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.2195506 = idf(docFreq=87, maxDocs=44218)
               0.5 = fieldNorm(doc=4445)
         2.8989284 = weight(author_txt:rafols in 4445) [ClassicSimilarity], result of:
           2.8989284 = score(doc=4445,freq=1.0), product of:
             0.623493 = queryWeight, product of:
               1.2880292 = boost
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.052055907 = queryNorm
             4.649496 = fieldWeight in 4445, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.5 = fieldNorm(doc=4445)
       0.6666667 = coord(2/3)
   

Similar documents (content)

1. Rotolo, D.; Leydesdorff, L.: Matching Medline/PubMed data with Web of Science: A routine in R language (2015) 0.29

   0.28643265 = sum of:
     0.28643265 = product of:
       0.895102 = sum of:
         0.116299175 = weight(abstract_txt:pubmed in 2224) [ClassicSimilarity], result of:
           0.116299175 = score(doc=2224,freq=2.0), product of:
             0.13589832 = queryWeight, product of:
               7.7456436 = idf(docFreq=51, maxDocs=44218)
               0.01754513 = queryNorm
             0.8557808 = fieldWeight in 2224, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.7456436 = idf(docFreq=51, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.0298518 = weight(abstract_txt:subject in 2224) [ClassicSimilarity], result of:
           0.0298518 = score(doc=2224,freq=2.0), product of:
             0.069154434 = queryWeight, product of:
               1.00883 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.01754513 = queryNorm
             0.43166864 = fieldWeight in 2224, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.041556038 = weight(abstract_txt:citation in 2224) [ClassicSimilarity], result of:
           0.041556038 = score(doc=2224,freq=1.0), product of:
             0.10862733 = queryWeight, product of:
               1.2643796 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.01754513 = queryNorm
             0.38255602 = fieldWeight in 2224, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.04838711 = weight(abstract_txt:headings in 2224) [ClassicSimilarity], result of:
           0.04838711 = score(doc=2224,freq=1.0), product of:
             0.12022722 = queryWeight, product of:
               1.3301767 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.01754513 = queryNorm
             0.40246385 = fieldWeight in 2224, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.19393073 = weight(abstract_txt:mesh in 2224) [ClassicSimilarity], result of:
           0.19393073 = score(doc=2224,freq=2.0), product of:
             0.24077097 = queryWeight, product of:
               1.8823917 = boost
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.01754513 = queryNorm
             0.8054573 = fieldWeight in 2224, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.055494804 = weight(abstract_txt:database in 2224) [ClassicSimilarity], result of:
           0.055494804 = score(doc=2224,freq=1.0), product of:
             0.16596936 = queryWeight, product of:
               2.210227 = boost
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.01754513 = queryNorm
             0.33436778 = fieldWeight in 2224, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.23597695 = weight(abstract_txt:medline in 2224) [ClassicSimilarity], result of:
           0.23597695 = score(doc=2224,freq=2.0), product of:
             0.31413513 = queryWeight, product of:
               2.6333697 = boost
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.01754513 = queryNorm
             0.75119567 = fieldWeight in 2224, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.17360537 = weight(abstract_txt:medical in 2224) [ClassicSimilarity], result of:
           0.17360537 = score(doc=2224,freq=1.0), product of:
             0.3824181 = queryWeight, product of:
               3.751001 = boost
               5.8107834 = idf(docFreq=359, maxDocs=44218)
               0.01754513 = queryNorm
             0.45396745 = fieldWeight in 2224, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8107834 = idf(docFreq=359, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
       0.32 = coord(8/25)
   

2. Leydesdorff, L.; Opthof, T.: Citation analysis with medical subject Headings (MeSH) using the Web of Knowledge : a new routine (2013) 0.28

   0.277912 = sum of:
     0.277912 = product of:
       0.868475 = sum of:
         0.021108411 = weight(abstract_txt:subject in 943) [ClassicSimilarity], result of:
           0.021108411 = score(doc=943,freq=1.0), product of:
             0.069154434 = queryWeight, product of:
               1.00883 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.01754513 = queryNorm
             0.30523583 = fieldWeight in 943, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.078125 = fieldNorm(doc=943)
         0.083112076 = weight(abstract_txt:citation in 943) [ClassicSimilarity], result of:
           0.083112076 = score(doc=943,freq=4.0), product of:
             0.10862733 = queryWeight, product of:
               1.2643796 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.01754513 = queryNorm
             0.76511204 = fieldWeight in 943, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.078125 = fieldNorm(doc=943)
         0.04838711 = weight(abstract_txt:headings in 943) [ClassicSimilarity], result of:
           0.04838711 = score(doc=943,freq=1.0), product of:
             0.12022722 = queryWeight, product of:
               1.3301767 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.01754513 = queryNorm
             0.40246385 = fieldWeight in 943, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.078125 = fieldNorm(doc=943)
         0.056859516 = weight(abstract_txt:index in 943) [ClassicSimilarity], result of:
           0.056859516 = score(doc=943,freq=1.0), product of:
             0.1532553 = queryWeight, product of:
               1.8393371 = boost
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.01754513 = queryNorm
             0.37101173 = fieldWeight in 943, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.078125 = fieldNorm(doc=943)
         0.19393073 = weight(abstract_txt:mesh in 943) [ClassicSimilarity], result of:
           0.19393073 = score(doc=943,freq=2.0), product of:
             0.24077097 = queryWeight, product of:
               1.8823917 = boost
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.01754513 = queryNorm
             0.8054573 = fieldWeight in 943, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.078125 = fieldNorm(doc=943)
         0.055494804 = weight(abstract_txt:database in 943) [ClassicSimilarity], result of:
           0.055494804 = score(doc=943,freq=1.0), product of:
             0.16596936 = queryWeight, product of:
               2.210227 = boost
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.01754513 = queryNorm
             0.33436778 = fieldWeight in 943, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.078125 = fieldNorm(doc=943)
         0.23597695 = weight(abstract_txt:medline in 943) [ClassicSimilarity], result of:
           0.23597695 = score(doc=943,freq=2.0), product of:
             0.31413513 = queryWeight, product of:
               2.6333697 = boost
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.01754513 = queryNorm
             0.75119567 = fieldWeight in 943, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.078125 = fieldNorm(doc=943)
         0.17360537 = weight(abstract_txt:medical in 943) [ClassicSimilarity], result of:
           0.17360537 = score(doc=943,freq=1.0), product of:
             0.3824181 = queryWeight, product of:
               3.751001 = boost
               5.8107834 = idf(docFreq=359, maxDocs=44218)
               0.01754513 = queryNorm
             0.45396745 = fieldWeight in 943, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8107834 = idf(docFreq=359, maxDocs=44218)
               0.078125 = fieldNorm(doc=943)
       0.32 = coord(8/25)
   

3. Rae, A.R.; Mork, J.G.; Demner-Fushman, D.: ¬The National Library of Medicine indexer assignment dataset : a new large-scale dataset for reviewer assignment research (2023) 0.23

   0.2311527 = sum of:
     0.2311527 = product of:
       0.7223522 = sum of:
         0.01688673 = weight(abstract_txt:subject in 885) [ClassicSimilarity], result of:
           0.01688673 = score(doc=885,freq=1.0), product of:
             0.069154434 = queryWeight, product of:
               1.00883 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.01754513 = queryNorm
             0.24418867 = fieldWeight in 885, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.0625 = fieldNorm(doc=885)
         0.03324483 = weight(abstract_txt:citation in 885) [ClassicSimilarity], result of:
           0.03324483 = score(doc=885,freq=1.0), product of:
             0.10862733 = queryWeight, product of:
               1.2643796 = boost
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.01754513 = queryNorm
             0.30604482 = fieldWeight in 885, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.896717 = idf(docFreq=897, maxDocs=44218)
               0.0625 = fieldNorm(doc=885)
         0.03870969 = weight(abstract_txt:headings in 885) [ClassicSimilarity], result of:
           0.03870969 = score(doc=885,freq=1.0), product of:
             0.12022722 = queryWeight, product of:
               1.3301767 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.01754513 = queryNorm
             0.3219711 = fieldWeight in 885, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.0625 = fieldNorm(doc=885)
         0.04548761 = weight(abstract_txt:index in 885) [ClassicSimilarity], result of:
           0.04548761 = score(doc=885,freq=1.0), product of:
             0.1532553 = queryWeight, product of:
               1.8393371 = boost
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.01754513 = queryNorm
             0.29680938 = fieldWeight in 885, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.0625 = fieldNorm(doc=885)
         0.15514459 = weight(abstract_txt:mesh in 885) [ClassicSimilarity], result of:
           0.15514459 = score(doc=885,freq=2.0), product of:
             0.24077097 = queryWeight, product of:
               1.8823917 = boost
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.01754513 = queryNorm
             0.64436585 = fieldWeight in 885, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.0625 = fieldNorm(doc=885)
         0.06278521 = weight(abstract_txt:database in 885) [ClassicSimilarity], result of:
           0.06278521 = score(doc=885,freq=2.0), product of:
             0.16596936 = queryWeight, product of:
               2.210227 = boost
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.01754513 = queryNorm
             0.37829396 = fieldWeight in 885, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.0625 = fieldNorm(doc=885)
         0.23120926 = weight(abstract_txt:medline in 885) [ClassicSimilarity], result of:
           0.23120926 = score(doc=885,freq=3.0), product of:
             0.31413513 = queryWeight, product of:
               2.6333697 = boost
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.01754513 = queryNorm
             0.7360185 = fieldWeight in 885, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.0625 = fieldNorm(doc=885)
         0.13888429 = weight(abstract_txt:medical in 885) [ClassicSimilarity], result of:
           0.13888429 = score(doc=885,freq=1.0), product of:
             0.3824181 = queryWeight, product of:
               3.751001 = boost
               5.8107834 = idf(docFreq=359, maxDocs=44218)
               0.01754513 = queryNorm
             0.36317396 = fieldWeight in 885, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8107834 = idf(docFreq=359, maxDocs=44218)
               0.0625 = fieldNorm(doc=885)
       0.32 = coord(8/25)
   

4. Ralston, N.M.: Controlled vocabularies for MEDLARS databases (1995) 0.23

   0.22617842 = sum of:
     0.22617842 = product of:
       0.8077801 = sum of:
         0.021108411 = weight(abstract_txt:subject in 2640) [ClassicSimilarity], result of:
           0.021108411 = score(doc=2640,freq=1.0), product of:
             0.069154434 = queryWeight, product of:
               1.00883 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.01754513 = queryNorm
             0.30523583 = fieldWeight in 2640, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.078125 = fieldNorm(doc=2640)
         0.032898072 = weight(abstract_txt:techniques in 2640) [ClassicSimilarity], result of:
           0.032898072 = score(doc=2640,freq=1.0), product of:
             0.09296011 = queryWeight, product of:
               1.1696509 = boost
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.01754513 = queryNorm
             0.3538945 = fieldWeight in 2640, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5298495 = idf(docFreq=1295, maxDocs=44218)
               0.078125 = fieldNorm(doc=2640)
         0.04838711 = weight(abstract_txt:headings in 2640) [ClassicSimilarity], result of:
           0.04838711 = score(doc=2640,freq=1.0), product of:
             0.12022722 = queryWeight, product of:
               1.3301767 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.01754513 = queryNorm
             0.40246385 = fieldWeight in 2640, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.078125 = fieldNorm(doc=2640)
         0.23751569 = weight(abstract_txt:mesh in 2640) [ClassicSimilarity], result of:
           0.23751569 = score(doc=2640,freq=3.0), product of:
             0.24077097 = queryWeight, product of:
               1.8823917 = boost
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.01754513 = queryNorm
             0.98647976 = fieldWeight in 2640, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.078125 = fieldNorm(doc=2640)
         0.055494804 = weight(abstract_txt:database in 2640) [ClassicSimilarity], result of:
           0.055494804 = score(doc=2640,freq=1.0), product of:
             0.16596936 = queryWeight, product of:
               2.210227 = boost
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.01754513 = queryNorm
             0.33436778 = fieldWeight in 2640, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.078125 = fieldNorm(doc=2640)
         0.16686092 = weight(abstract_txt:medline in 2640) [ClassicSimilarity], result of:
           0.16686092 = score(doc=2640,freq=1.0), product of:
             0.31413513 = queryWeight, product of:
               2.6333697 = boost
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.01754513 = queryNorm
             0.5311756 = fieldWeight in 2640, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.078125 = fieldNorm(doc=2640)
         0.24551506 = weight(abstract_txt:medical in 2640) [ClassicSimilarity], result of:
           0.24551506 = score(doc=2640,freq=2.0), product of:
             0.3824181 = queryWeight, product of:
               3.751001 = boost
               5.8107834 = idf(docFreq=359, maxDocs=44218)
               0.01754513 = queryNorm
             0.64200693 = fieldWeight in 2640, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.8107834 = idf(docFreq=359, maxDocs=44218)
               0.078125 = fieldNorm(doc=2640)
       0.28 = coord(7/25)
   

5. Bronson, R.J.: MeSH chemical headings and pharmacologic action (1997) 0.22

   0.22155415 = sum of:
     0.22155415 = product of:
       0.9231423 = sum of:
         0.029551776 = weight(abstract_txt:subject in 984) [ClassicSimilarity], result of:
           0.029551776 = score(doc=984,freq=1.0), product of:
             0.069154434 = queryWeight, product of:
               1.00883 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.01754513 = queryNorm
             0.42733017 = fieldWeight in 984, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
         0.06774195 = weight(abstract_txt:headings in 984) [ClassicSimilarity], result of:
           0.06774195 = score(doc=984,freq=1.0), product of:
             0.12022722 = queryWeight, product of:
               1.3301767 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.01754513 = queryNorm
             0.5634494 = fieldWeight in 984, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
         0.27150303 = weight(abstract_txt:mesh in 984) [ClassicSimilarity], result of:
           0.27150303 = score(doc=984,freq=2.0), product of:
             0.24077097 = queryWeight, product of:
               1.8823917 = boost
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.01754513 = queryNorm
             1.1276402 = fieldWeight in 984, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
         0.07769273 = weight(abstract_txt:database in 984) [ClassicSimilarity], result of:
           0.07769273 = score(doc=984,freq=1.0), product of:
             0.16596936 = queryWeight, product of:
               2.210227 = boost
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.01754513 = queryNorm
             0.4681149 = fieldWeight in 984, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2799077 = idf(docFreq=1663, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
         0.23360527 = weight(abstract_txt:medline in 984) [ClassicSimilarity], result of:
           0.23360527 = score(doc=984,freq=1.0), product of:
             0.31413513 = queryWeight, product of:
               2.6333697 = boost
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.01754513 = queryNorm
             0.7436458 = fieldWeight in 984, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
         0.24304752 = weight(abstract_txt:medical in 984) [ClassicSimilarity], result of:
           0.24304752 = score(doc=984,freq=1.0), product of:
             0.3824181 = queryWeight, product of:
               3.751001 = boost
               5.8107834 = idf(docFreq=359, maxDocs=44218)
               0.01754513 = queryNorm
             0.63555443 = fieldWeight in 984, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8107834 = idf(docFreq=359, maxDocs=44218)
               0.109375 = fieldNorm(doc=984)
       0.24 = coord(6/25)